Câu hỏi:
14/07/2023 333
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.
It’s a sound you will probably never hear, a sickened tree sending out a distress signal. But a group of scientists has heard the cries, and they think some insects also hear the trees and are drawn to them like vulture to a dying animal. Researchers with the US Department of Agriculture’s Forest Service fastened sensors to the bark of drought-stricken trees clearly heard distress calls. According to one of the scientists, most parched trees transmit their plight in the 50-hertz to 50kilohertz range. (The unaided human ear can detect no more than 20 kilohertz). Red oak, maple, white pine, and birch all make slightly different sounds in the form of vibrations at the surface of the wood.
The scientists think that the vibrations are created when the water columns inside tubes that run along the length of the tree break, a result of too little water following through them.
These fractured columns send out distinctive vibration patterns. Because some insects communicate at ultrasonic frequencies, they may pick up the trees' vibration and attack the weakened trees. Researchers are now running tests with potted trees that have been deprived of water to see if the sound is what attracts the insects. “Water-stressed trees also smell differently from other trees, and they experience thermal changes, so insects could be responding to something other than sound”, one scientist said.
All the following are mentioned as possible factors in drawing insects to weakened trees EXCEPT______.
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.
It’s a sound you will probably never hear, a sickened tree sending out a distress signal. But a group of scientists has heard the cries, and they think some insects also hear the trees and are drawn to them like vulture to a dying animal. Researchers with the US Department of Agriculture’s Forest Service fastened sensors to the bark of drought-stricken trees clearly heard distress calls. According to one of the scientists, most parched trees transmit their plight in the 50-hertz to 50kilohertz range. (The unaided human ear can detect no more than 20 kilohertz). Red oak, maple, white pine, and birch all make slightly different sounds in the form of vibrations at the surface of the wood.
The scientists think that the vibrations are created when the water columns inside tubes that run along the length of the tree break, a result of too little water following through them.
These fractured columns send out distinctive vibration patterns. Because some insects communicate at ultrasonic frequencies, they may pick up the trees' vibration and attack the weakened trees. Researchers are now running tests with potted trees that have been deprived of water to see if the sound is what attracts the insects. “Water-stressed trees also smell differently from other trees, and they experience thermal changes, so insects could be responding to something other than sound”, one scientist said.
All the following are mentioned as possible factors in drawing insects to weakened trees EXCEPT______.
Đáp án chính xác
Câu hỏi trong đề:
Đề kiểm tra giữa kì 2 Tiếng anh 12 năm 2023 có đáp án !!
Sách mới 2k7: Tổng ôn Toán, Lí, Hóa, Văn, Sử, Địa…. kỳ thi tốt nghiệp THPT Quốc gia 2025, đánh giá năng lực (chỉ từ 110k).
Quảng cáo
Trả lời:
Giải bởi Vietjack
Chọn C
Câu hỏi cùng đoạn
Câu 2:
It can be inferred from the passage that research concerning the distress signals of trees______.
It can be inferred from the passage that research concerning the distress signals of trees______.
Đáp án chính xác
Lời giải của GV VietJack
Chọn D
Câu 3:
Which of the following could be considered a cause of the distress signals of trees?
Which of the following could be considered a cause of the distress signals of trees?
Đáp án chính xác
Lời giải của GV VietJack
Chọn D
Câu 4:
Which of the following is the main topic of the passage?
Which of the following is the main topic of the passage?
Đáp án chính xác
Lời giải của GV VietJack
Chọn D
Nhà sách VIETJACK:
CÂU HỎI HOT CÙNG CHỦ ĐỀ
Câu 1:
Most educational specialists believe that early schooling should provide children with an (1)_____ of their own abilities and the self-confidence to use their abilities.
Xem đáp án »
14/07/2023
733
Câu 2:
Which of the following is NOT true about Facebook users in the UK?
Which of the following is NOT true about Facebook users in the UK?
Xem đáp án »
14/07/2023
526
Câu 3:
Mark the letter A, B, C or D on your answer sheet to indicate the most suitable response to complete each of the following exchanges.
Ann: “Passing a university entrance exam is not difficult.” - John: “_____.”
Mark the letter A, B, C or D on your answer sheet to indicate the most suitable response to complete each of the following exchanges.
Ann: “Passing a university entrance exam is not difficult.” - John: “_____.”
Xem đáp án »
14/07/2023
396
Câu 4:
Mary: “Our team has just won that English Competition.” - Anne: “_____”
Mary: “Our team has just won that English Competition.” - Anne: “_____”
Xem đáp án »
14/07/2023
163
Câu 5:
Mark the letter A, B, C, D on your answer sheet to indicate the word whose underlined part differs from that of the other three in pronunciation in each of the following questions:
Mark the letter A, B, C, D on your answer sheet to indicate the word whose underlined part differs from that of the other three in pronunciation in each of the following questions:
Xem đáp án »
14/07/2023
154
Câu 6:
When being interviewed, you should concentrate on what the interviewer is saying or asking you.
When being interviewed, you should concentrate on what the interviewer is saying or asking you.
Xem đáp án »
14/07/2023
112
về câu hỏi!